TY - JOUR AU - Karakostas, George L. AU - Purnaras, Ioannis K. TI - Singular regularization of operator equations in $L_1$ spaces via fractional differential equations JO - Electronic Journal of Differential Equations PY - 2016 VL - 2016 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EJDE_2016__2016__a19/ LA - en ID - EJDE_2016__2016__a19 ER -